Double-acting four-cycle explosion-motor.



FIGI.

"No: 723,071. PATENTED MAR. 17, 1903.. A; 'THIERY.

DOUBLE ACTING POURV-GYGLEVBXPLOSION MOTOR.

APPLIOATION FILED MAY 2, 1902.

Qw O 9 1 7 1 R A M D E T N E T A P A L 7 0 3 2 7 0 N DOUBLE ACTING FOUR-CYCLE EXPLOSION MOTOR.

APPLIOATION FILED MAY 2, 1902.

6 SHEETSSHEET 2 NO MODEL.

llllllllll In vezzlor.

PATENT-ED MAR. 17, 1903.

A. THIERY! DOUBLE ACTING POUR-CYCLE EXPLOSION MOTOR.

APPLICATION FILED MAY 2, 1902.

6 SHEETS-SHEET 3.,

N0 MODEL.

'wfnevar 'No. 723,071. PATENTED MAR.17, 190s.

' A. THIER'Y.

DOUBLE ACTING FOUR-CYCLE EXPLOSION MOTOR.

' APPLICATION FILED MAY 2, 1902. .110 110921.. e SHBBTS-SHBET 4.

' FIG-6 PATENTED MAR. 17, 1903.

A. THIERY.-

'DOUBLB ACTING FOUR-CYCLE EXPLOSION MOTOR.

' APPLICATION FILED MAY 2, 1902.

6 SHEETS-SHEET 6.

N0 MODEL.

FIG]

No. 723,07 PATENTED MAR. 17, 1903 A. T IERY.

DOUBLE ACTING FOUR-CYCLE EXPLOSION MOTOR. APPLIOAI'IONPILED MAY 2, 1902. no menu. 6 SHE ETS--SHEET=6 ELSE tion thereof.

to move in both cylinders.

UNITED STATES ATENT OFFICE.

ALBERT THIERY, OF MAROINELLE, BELGIUM.

DOUBLE-ACTING FOUR-CYCLE EXPLOSION-MOTOR- SPECIFICATION forming part of Letters Patent No. 723,071, dated March 17, 1903.

Application filed May 2, 1902. Serial No. 105,653. (No model.) 7

To all whom it may concern:

Be it known that I, ALBERT THIE'IRY, a citizen of the French Republic, and a resident of Marcinelle, Belgium, have invented a certain new and useful Double-Acting Four-Cycle ExplosiomMotor, of which the following is a specification.

My invention relates to a double-acting four-cycle explosion-motor provided with a cylindrical distributing-valve adapted to be normally drivenby means of alcohol or other motive fluids capable of producing. gaseous explosive mixtures and which is further provided with special means to allow the same to be driven by steam or compressed air when required. L The invention will be fully described with reference to the annexed drawings, in which- Figure 1 is a longitudinal section of the motor from which the cylinder-covers have been removed. Fig. 2 is a plan of'a portion of the motor. Fig. 3 is an end view of the same. Fig. 4 is a sectional elevation of a por- Fig. 5 is aface View of a cylinder-cover. Fig. 6 is a detail View. Fig. 7 is a longitudinal section of a portionof a slightly modified motor. Fig. 8 isa cross-section of a portion of the motor.

The motor comprises two cylinders 1 and 2,

disposed in axial alinement and secured together by means of flanges provided at that end of each cylinder which forms the median line of the motor. A single piston 3 is adapted said piston is dependent on the stroke or amount of travel and must be such that the piston-rings 4 4: of the pistons shall not pass over the apertures 5, which serve to guide the tenon 6, fixed in the piston for the purpose of reciprocating a carriage 7, as hereinafter fully described.

The two extremities of the motorpiston are recessed to such a depth as to serve as explosion and compression chambers, and the pistonis hollow and formed with two chambers 8 and 9 for use as oil-reservoirs. The piston is perforated at the outer ends of said chambers with fine holes 10 around its pcriphery topermit sufiicient oil to issue for the-properlubrication of the piston-rings and the cylinder.

The tenon 6 is fixed with its tapered tailin The length of the piston and firmly held in position by means of a screw inserted from the opposite direction through the piston. The head of the tenon is fixed to the carriage 7 in such a head arranged to move in guideways.

Upon the crank-shaft 16 is keyed a toothed pinion 13, meshing with a toothed Wheel 1410f twice the diameter of said pinion and mounted on an intermediate shaft 15, Fig. 3, which thus revolves at half the speed as the crankshaft. The shaft 15 is mounted in a bracket or casing 16, fixed to the frame 17 of the motor, which frame also forms an oil-casing for the latter. Upon shaft 15 is mounted adrum or cam-pulley formed with a peripheral groove 18, which controls one or more oscillating levers 19, fulcrumed centrally upon pivots 20. These oscillating levers control each a distributer-piston, so as to move the same in endwise direct-ion within cylinders 22, which serve as covers to the motor-cylinder. In the arrangement illustrated in the annexed drawings two such oscillating lovers are shown in connection with two distributingpistons. Each of said levers is fitted. at its free end with a roller engaged in the groove of the drum, while the other end is articulated to a rod 21, hinged to the corresponding distributing-piston. (See Fig. 6.) In the cylinder 22 is an opening composed of a number of small holes for the admission to one side of the motor-cylinder, and at the other end facing it on the other side of the distributingpiston is provided the exhaust-port 23. (See Fig. 5.)

Each distributing-piston is furnished with piston-rings 24 to render it tight, and they are so disposed thatduring the admission period the exhaust-port is closed. After admission the piston is moved so as to bring a plain portion of the piston in front of the ports during the period of compression and explosion. Hereupon the distributing-piston is displaced, so as to open communication between the admission and exhaust ports by means of a passage 25, formed in said piston, the communication lasting for the time of exhaust. This cycle of operation is continuously repeated during the working of the motor, and as the same effects are produced in both cylinders the motor is doubleacting. The motor may, however, be also single-acting-that it is to say, it may have only one cylinder or it may have four cylinders with a single drum or cam-pulley. The distributing-piston in the covers may be placed either longitudinally or vertically. The double action may also be obtained with valves. I

The operation of the motor is as follows: With a single cylinder during the first period of admission the motor-piston moves so as to draw in the volume of gas. At the same moment the distributing-piston opens the admission-port ofthe motor-cylinder, (dead-center,) then the distributing-piston is moved to the middle of its stroke, and the admissionport of the cylinder is closed and the gas is V retained in the cylinder for the second period,

the compression, and the third period, the explosion. On reaching the end of its stroke, being another dead-con ter, the distributingpiston is adjusted and opens the ports so as to permit the gas to escape during the entire stroke of the motor-piston toward the cover, and thus produces the fourth period. At the same moment the distributing-piston is moved back, and so uncovers the admission-port to repeat the same cycle herein described. The second cylinder acts in the same manner.

An important advantage results from the arrangement of thedistributing-piston-viz., the latter duringits passagefrom the exhaust position to the admission draws in gas and produces an intimate commingling of the gas and air. K

The ignition of the gas may be effected either by an electric spark or by an incandescent tube or any other appropriate means.

The modified motor shown in Figs. 7 and 8 is constructed for double action on the fourcycle principle for each cylinder without valve and with a single admission and exhaust port, The to-and-fro motion is transmitted by the tenon 24, fixed to the motorpiston 25 to a slotted link 26, which imparts rotary motion to thecrank Without the intervention of a connecting-rod. The admission of the gas takes place through a recess in the rod 27 of the distributing-piston 28, and the exhaustis eifected through a similar recess formed in the extremity of said distributing-piston. Theserecesses arebrought at the required moment by the motion of the distributing-piston in front of a single port, so as to permit either of the admission or of the exhaust.

The motor may be operated by means of any explosion-gas or by compressed air or steam.

When driven by compressed air or steam, the motor differs from that driven by an explosion-gas by the fact that it has two distributing-pistons which are traversed by a channel-forming steam-passage leading into the cylinder. The distributing-piston is furnished with piston-rings at each side of the said channel, so as to render it tight. The motor-piston is formed with a flat base.-

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is 1 g 1. In a double'acting explosive-motor, the combination of a suitable frame,'two cylin ders mounted on the frame, a piston having its ends extending into both said cylinders, an arm attached to and projecting radially from the piston about the middle of its length, a cranked shaft journaled in hearings on the frame and extending transversely of the piston, connections between said radially-projecting arm and said shaft, whereby the lat ter is rotated as the piston is reciprocated, auxiliary pistons moving transversely of the main piston and controlling the admission of explosive charges to the cylinders, a countershaft, a drum secured to the counter-shaft and having a cam-groove formed therein, levers connected to the auxiliary pistons and each having a stud extending into the camgroove on said drum, and gearing connecting said counter-shaft and the shaft driven by the main piston, substantially as and for the purpose described.

2. In a double-acting explosive-motor, the combination of a suitable frame, two cylinders mounted on the frame, apiston arranged between and extending into both cylinders, an arm projecting radially from the piston, a slide connected to the outer end of said arm and adapted to reciprocate in unison with the piston, a cranked shaft j ournaled in bearings on the frame and extending transversely of the piston, a link connecting said slide with said cranked shaft, auxiliary pistons controlling the admission of explosive charges to the cylinders, levers connected to said auxiliary pistons, a counter-shaft geared to the cranked shaft, and a cam mounted on said counter-shaft and adapted to actuate said levers and the auxiliary pistons connected thereto.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

ALBERT THIERY. Witnesses:

0. Sony, GREGORY PHELAN. 

